Agreed also.What I invariably want is a fixed time journey outbound and a flexible time journey inbound.
I want to see the fares for a FIX FIX versus a FIX FLEX so I can then judge whether the additional fare (difference between fix and flex) for the FLEX on the inbound is something I am prepared to pay.
Virgin, and then Avanti for a while, offered the Saver Half (SVH) ticket which did this, you would buy an outbound advance and a return SVH, it was my ticket combination of choice for a while, including first class upgrade for the return journey from London on a Sunday.
Now the ticket doesn’t exist and the alternatives seem more expensive, to the extent that I’m not prepared to pay the extra so go back to advance tickets both ways.